Fabrication of flexible metal-nanoparticle films using graphene oxide sheets as substrates.
Fabrication of flexible metal-nanoparticle films using graphene oxide sheets as substrates.
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DOI：
10.1002/smll.200900548
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发表时间：
2009-10
期刊：
影响因子：
13.3
通讯作者：
Chao Xu;Xin Wang
中科院分区：
文献类型：
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作者：
Chao Xu;Xin Wang
石墨烯基片具有独特的纳米结构和各种迷人的性能，是有前途的新型复合材料的纳米结构单元。在本文中，氧化石墨烯片被用作用于形成银纳米颗粒膜的纳米级基底。这些组装在氧化石墨烯片上的银纳米颗粒膜是柔性的，并且可以在水溶液中形成稳定的悬浮液。它们也可以容易地加工，形成具有高反射率的宏观膜。这种杂化膜中氧化石墨烯的拉曼信号被附着的银纳米颗粒增加，显示出表面增强的拉曼散射活性。增强的程度可以通过改变氧化石墨烯片上的银纳米颗粒的量来调节。
Graphene-based sheets that possess a unique nanostructure and a variety of fascinating properties are appealing as promising nanoscale building blocks of new composites. Herein, graphene oxide sheets are used as the nanoscale substrates for the formation of silver-nanoparticle films. These silver-nanoparticle films assembled on graphene oxide sheets are flexible and can form stable suspensions in aqueous solutions. They can also be easily processed, forming macroscopic films with high reflectivity. Raman signals of graphene oxide in such hybrid films are increased by the attached silver nanoparticles, displaying surface-enhanced Raman scattering activity. The degree of enhancement can be adjusted by varying the quantity of silver nanoparticles on the graphene oxide sheets.